Operating means for reciprocatory elements.



P. .I. DREHER.

OPERATING MEANS FOR RECIPROCATORY ELEMENTS.

APPLICATION man mm. a, 1916. 1 %33 3g@ Patented July 17, 1917. 2SHEETS-SHEET I.

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OPERATING MEANS FOR RECIPROCATORY ELEMENTS. APPLICAHON FILED MAR. 9.1916.

1 23,3g@a Patented July 17, 1917.

2 SHEETSSHEET 2.

- IVEN'T'UR PHILLIP JACOB DREI-IER, F TOLEDO, OHIO.

OPERATING MEANS FOR RECIPROCATORY ELEMENTS.

Specification of Letters Patent.

Patented July 1'7, 1917.

Application filed March 9, 1916. Serial N 0. 83,103.

To all whom it may concern:

Be it known that I, PHILLIP JACOB DREHER, a citizen of the UnitedStates, and a resident of Toledo, in the county of Lucas and State ofOhio, haveinvented a certain new and useful Operating Means for Beciprocatory Elements; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as up willenable others skilled in the art to which capable of being easily andquickly disconnected from the pumps to permit a manual operatingthereof.

The invention is fully described in the followingspecification, andwhile, in its broader aspect, it is capable of embodiment in numerousforms, a preferred embodiment thereof is illustrated in the accompanyingdrawings, in which Figure 1 is a transverse sectional view'of aninstrument embodying my invention, with parts broken away. Fig. 2 is asection on the line 'u v in Fig. 1, with parts broken away; and Figs. 3and 4: are sections on the lines ww and w0c, respectively, in Fig. 2,one pump bellows being expanded and the other collapsed.

Referring to the drawings, 1 designates the case of an instrument withwhich my invention is associated, and 2 the pneumatic pumps or bellowsthereof, which are customarily arranged within the case. Each of thepumps or bellows 2, two of which are shown in the present instance, isdis posed in upright position and has the stationary side .2 and themovable side 2 hinged together at their upper ends, as is wellunderstood in the art. The movable side 2 in each bellowshas connectionwith a foot treadle 3, in the present instance, through the medium of apair of rods 4.

A spring finger 5 is fixed at one end to the upper end of each bellowsside 2* and has its free end bearing inward against the side 2 tonormally act thereon to effect a compressing or inward collapsingmovement thereof. If the bellows or pumps are to be manually operated,it is apparent that this may be accomplished by imparting pumpingmovements to the treadles 3, as adownward movement of each treadle willforce the side 2 of the associated bellows to its open position againstthe tension of the spring 5, as shown in Fig. 1, and upon a release ofthe foot pressure on the treadle, the spring 5 will then impart acollapsing movement to the side 2 The means illustrated in the presentin stance for mechanically operating the bellows in conjunction with thespring 5 will now be described. Mounted in standards 6, below thestationary side 2 of the bellows, is a shaft 7 extending lengthwise ofthe case 1 and carrying a sprocket wheel 8 beneath each bellows, thesprocket wheel being located at one side of a forked bracket 9 that isfixed to the lower end of the sta tionary side 2 of each bellows, saidbracket preferably having at lease one arm thereof forming a bearing forthe shaft 7. Abracket 10 is fixed to and projects downward from thelower or free end of the movable side 2 of each bellows and has itslower end forked and carrying a shaft 11 on which, between the forkarms, is mounted a segmental gear 12. A sprocket wheel 13 is alsomounted on the shaft 11 at one side of the fork 10 and in transverseregister with the sprocketwheel 8 on the shaft 7 A sprocket chain 14connects the sprocket wheels 8 and 13 and is intended to communicaterotation from the shaft 7 to the shaft 11 and through it to the gear 12.The length of the chain 14: is sufficient to permit a maximum opening ofthe bellows 2 with which it is associated.

A rack-bar 15 is pivoted at one end to the bracket 9 of each bellowsbetween the arms of such bracket, as at 16, (Figs. 8 and 4,) andprojects therefrom over the segmental gear 12 transversely of its axisand is provided on its lower edge with rack teeth for meshing with theteeth of said gear. The free end of each rack-bar 15 projects throughthe fork 10 of the associated bellows and beneath a guide-pin 17therein, which engages the top edge of the rack-bar and retains theteeth thereof in position to mesh with the teeth of the gear.

It is evident that the rotation of the gear 12 for each bellows beingcontinuous the set of gear teeth thereon will intermittently move intoand out of mesh with the teeth on the rack-bar 15. When the bellows isin its n'ormal collapsed position, due to the compressing action of thespring thereon, the

segmental set of teeth on the'gear 12 will turn intomeshing engagementwith the set of teeth onthe associated rack-bar 15 at the inner endthereof and will cause an opening of the bellows due to the geartraveling out on the rack-bar which is held stationary against endwisemovement by reason of its "rear end being pivoted to the stationarybracket 9. When the bellows has been opened to itsmaX-imum extent by theoutward traveling of the gear 12 on the rackbar, the segmental set ofteeth on the gear will pass from engagement with the rack bar teeth andpermit the spring 5 to effect a collapsing of the bellows, suchcollapsing taking place when the gap in the gear is in register with therack-bar teeth. When the gear teeth have been moved into coactingrelation to the rack-bar they will engage the rack-bar teeth at theinner end of the set, thesa'me 'as before, and the gear will againtravel outward on the rack-bar to efiect an 7 opening of the bellows.

bolt 20 of the toggle .links 18 and has its karms extending upward atopposite sides of y the chain 14 and connected above the upper portionof the chain by across-pin 21 carryinga guide-roller 22,;(Fig. 2,) forcoacting with the upper side of the chain. The pin or -bolt 20 is alsoprovided with a guideroller 23, which bears against the upper side oflthe lower half of the sprocket :chain. The spacing between the lowersurfaces of the guide-rollers 22 and '23 is equal to the spacing betweenthe upper and lower portions of the chain when the shafts 7 and 11 areatthe maximum limit of their relative outward movements. It isevident'that upon an-inward relative movement of the shafts 7 and 11the'yoke 19 will be moved down- "ward carrying the upper and'lowerportions of the chain 14 therewith and preventing "slaoknes's'fromoccurring therein, as would otherwise be the case.

' A-sprocketwheel 24 is mounted on the shaft 10 at one end thereof, inthe present "instance, and is connected by a chain 25 to a sprocketwheel 26 on the outer end of a shaft 27, which is mounted in and has its'end projecting from a case 28. Mounted on the shaft 27 within the caseis a loose gearwheel 29 and a clutch member 30, the latter beingfeathered to and axially shiftable on the shaft into and out of clutchengagement with the hub portion of the gear 29. The movements of theclutch member 30 are controlled by a shaft lever 31 extending therefromto any suitable point of control. The gear 29 meshes with a pinion 32 ona counter-shaft 33 mounted in the case 28, and this shaft in turn hasconnection with a motor 34; through the medium of a chainand-sprocketconnection 35.

If it is desired in the use of my invention to operate the bellows orpump from the motor 34, or other suitable drive means, the clutch member30 is thrown into :clutch engagement with the gear 29, thuscommunicating rotation to the shaft 7 from the motor. The shaft 7 isdriven in a direction to drive the chain 14, shaft 11, and segmentalgear 12 in the direction indicated by the arrows in Figs. 3 and 4. It isthus evident that the gear 12 will first operate on the rack-bar 15 tocause a maximum opening of the bellows and will then release therack-bar to permit the spring 5 to effect a collapsing of the bellows,this action being repeated during theoperation of the instrument.

If it is desired to operate the bellows by foot power, the clutch 30 isreleased from engagement with the gear 29, thus disconnecting thebellows operating means from the motor. When the operating means hasbeen thus disconnected the operator can cooperate with the spring 5 toimpart a pumping action to the bellows by operating the treadles 3.

I wish it'understood that my invention is not limited to any specificconstruction, arrangement or form of the parts, as it is capable ofnumerous modifications without departing from'the spirit of the claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In combination, a movable member, a shaft carried bysaid member, astationary rack-bar, a segmental gear adapted when rotated tointermittently mesh with and release said rack-bar, said gear beingcarried by said shaft, means for normally moving said member to oneposition, and means for rotating said gear to move said member fromnormal position.

2. In combination, a movable member, a gear carried by said member,means acting on said member to urge it to one position, a rack-baranchored against longitudinal movements and positioned to mesh with saidgear, a drive shaft, and means connecting said drive shaft and gear forcontinuously driving the gear during movements of said member wherebythe gear intermittently coacts with the rack-bar to causea movement ofthe member from normal position and then releases the rack-bar to permita return of the member to normal position.

3. In combination, a movable member, a transversely movable shaftcarried by said member, a stationary shaft, a rack-bar anchored againstlongitudinal movements and extending transversely of said shafts, asegmental gear mounted on said movable shaft in position to mesh withsaid rack-bar, means for urging said member to move to normal position,chain-and-sprocket-wheel connection between said shafts to communicaterotation to the movable shaft from said stationary shaft whereby thegear wheel is caused to intermittently engage said rackbar and move saidmember from normal position and then release it, and means automaticallyoperable to prevent slack from occurring in the chain when said shaftshave relative transverse movements.

4. In combination, a movable member, a transversely movable shaftcarried by the movable member, a stationary shaft, a rackbar anchoredagainst longitudinal movements and extending transversely of saidshafts, a segmental gear mounted on said movable shaft in position tomesh with said rack-bar, means for urging said member to one position,chain-and-sprocket-wheel connection between said shafts to communicaterotation to the movable shaft from said stationary shaft whereby thegear wheel is caused to intermittently engage said rackbar and impart anopening movement to the movable member and then release it, toggle linkconnection between said shafts, and chain guiding means carried by saidlinks and movable therewith upon relative inward and outward movementsof the shafts to maintain the chain taut during such movements.

5. In combination, a movable member, means normally moving said memberin one direction, means having connection with said member and operableto successively move it in the opposite direction to said first meansand having two transversely spaced shafts, one of which has movementswith said member, chain-and-sprocket-Wheel connection between saidshafts, and means automatically operable by relative transversemovements of said shafts to retain the chain member of said connectiontaut when the shafts have relative transverse movements.

In testimony whereof I have hereunto signed my name to thisspecification.

PHILLIP J AGOB DREHER.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, I). C.

